btrfs_tree.h revision 934ec9495505d234b2c2fa284470c2f44aae9de9 
1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ***   To edit the content of this header, modify the corresponding
11 ***   source file (e.g. under external/kernel-headers/original/) then
12 ***   run bionic/libc/kernel/tools/update_all.py
13 ***
14 ***   Any manual change here will be lost the next time this script will
15 ***   be run. You've been warned!
16 ***
17 ****************************************************************************
18 ****************************************************************************/
19#ifndef _BTRFS_CTREE_H_
20#define _BTRFS_CTREE_H_
21#include <linux/btrfs.h>
22#include <linux/types.h>
23#define BTRFS_ROOT_TREE_OBJECTID 1ULL
24#define BTRFS_EXTENT_TREE_OBJECTID 2ULL
25#define BTRFS_CHUNK_TREE_OBJECTID 3ULL
26#define BTRFS_DEV_TREE_OBJECTID 4ULL
27#define BTRFS_FS_TREE_OBJECTID 5ULL
28#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL
29#define BTRFS_CSUM_TREE_OBJECTID 7ULL
30#define BTRFS_QUOTA_TREE_OBJECTID 8ULL
31#define BTRFS_UUID_TREE_OBJECTID 9ULL
32#define BTRFS_FREE_SPACE_TREE_OBJECTID 10ULL
33#define BTRFS_DEV_STATS_OBJECTID 0ULL
34#define BTRFS_BALANCE_OBJECTID - 4ULL
35#define BTRFS_ORPHAN_OBJECTID - 5ULL
36#define BTRFS_TREE_LOG_OBJECTID - 6ULL
37#define BTRFS_TREE_LOG_FIXUP_OBJECTID - 7ULL
38#define BTRFS_TREE_RELOC_OBJECTID - 8ULL
39#define BTRFS_DATA_RELOC_TREE_OBJECTID - 9ULL
40#define BTRFS_EXTENT_CSUM_OBJECTID - 10ULL
41#define BTRFS_FREE_SPACE_OBJECTID - 11ULL
42#define BTRFS_FREE_INO_OBJECTID - 12ULL
43#define BTRFS_MULTIPLE_OBJECTIDS - 255ULL
44#define BTRFS_FIRST_FREE_OBJECTID 256ULL
45#define BTRFS_LAST_FREE_OBJECTID - 256ULL
46#define BTRFS_FIRST_CHUNK_TREE_OBJECTID 256ULL
47#define BTRFS_DEV_ITEMS_OBJECTID 1ULL
48#define BTRFS_BTREE_INODE_OBJECTID 1
49#define BTRFS_EMPTY_SUBVOL_DIR_OBJECTID 2
50#define BTRFS_DEV_REPLACE_DEVID 0ULL
51#define BTRFS_INODE_ITEM_KEY 1
52#define BTRFS_INODE_REF_KEY 12
53#define BTRFS_INODE_EXTREF_KEY 13
54#define BTRFS_XATTR_ITEM_KEY 24
55#define BTRFS_ORPHAN_ITEM_KEY 48
56#define BTRFS_DIR_LOG_ITEM_KEY 60
57#define BTRFS_DIR_LOG_INDEX_KEY 72
58#define BTRFS_DIR_ITEM_KEY 84
59#define BTRFS_DIR_INDEX_KEY 96
60#define BTRFS_EXTENT_DATA_KEY 108
61#define BTRFS_EXTENT_CSUM_KEY 128
62#define BTRFS_ROOT_ITEM_KEY 132
63#define BTRFS_ROOT_BACKREF_KEY 144
64#define BTRFS_ROOT_REF_KEY 156
65#define BTRFS_EXTENT_ITEM_KEY 168
66#define BTRFS_METADATA_ITEM_KEY 169
67#define BTRFS_TREE_BLOCK_REF_KEY 176
68#define BTRFS_EXTENT_DATA_REF_KEY 178
69#define BTRFS_EXTENT_REF_V0_KEY 180
70#define BTRFS_SHARED_BLOCK_REF_KEY 182
71#define BTRFS_SHARED_DATA_REF_KEY 184
72#define BTRFS_BLOCK_GROUP_ITEM_KEY 192
73#define BTRFS_FREE_SPACE_INFO_KEY 198
74#define BTRFS_FREE_SPACE_EXTENT_KEY 199
75#define BTRFS_FREE_SPACE_BITMAP_KEY 200
76#define BTRFS_DEV_EXTENT_KEY 204
77#define BTRFS_DEV_ITEM_KEY 216
78#define BTRFS_CHUNK_ITEM_KEY 228
79#define BTRFS_QGROUP_STATUS_KEY 240
80#define BTRFS_QGROUP_INFO_KEY 242
81#define BTRFS_QGROUP_LIMIT_KEY 244
82#define BTRFS_QGROUP_RELATION_KEY 246
83#define BTRFS_BALANCE_ITEM_KEY 248
84#define BTRFS_TEMPORARY_ITEM_KEY 248
85#define BTRFS_DEV_STATS_KEY 249
86#define BTRFS_PERSISTENT_ITEM_KEY 249
87#define BTRFS_DEV_REPLACE_KEY 250
88#if BTRFS_UUID_SIZE != 16
89#error "UUID items require BTRFS_UUID_SIZE == 16!"
90#endif
91#define BTRFS_UUID_KEY_SUBVOL 251
92#define BTRFS_UUID_KEY_RECEIVED_SUBVOL 252
93#define BTRFS_STRING_ITEM_KEY 253
94#define BTRFS_CSUM_SIZE 32
95#define BTRFS_CSUM_TYPE_CRC32 0
96#define BTRFS_FT_UNKNOWN 0
97#define BTRFS_FT_REG_FILE 1
98#define BTRFS_FT_DIR 2
99#define BTRFS_FT_CHRDEV 3
100#define BTRFS_FT_BLKDEV 4
101#define BTRFS_FT_FIFO 5
102#define BTRFS_FT_SOCK 6
103#define BTRFS_FT_SYMLINK 7
104#define BTRFS_FT_XATTR 8
105#define BTRFS_FT_MAX 9
106struct btrfs_disk_key {
107  __le64 objectid;
108  __u8 type;
109  __le64 offset;
110} __attribute__((__packed__));
111struct btrfs_key {
112  __u64 objectid;
113  __u8 type;
114  __u64 offset;
115} __attribute__((__packed__));
116struct btrfs_dev_item {
117  __le64 devid;
118  __le64 total_bytes;
119  __le64 bytes_used;
120  __le32 io_align;
121  __le32 io_width;
122  __le32 sector_size;
123  __le64 type;
124  __le64 generation;
125  __le64 start_offset;
126  __le32 dev_group;
127  __u8 seek_speed;
128  __u8 bandwidth;
129  __u8 uuid[BTRFS_UUID_SIZE];
130  __u8 fsid[BTRFS_UUID_SIZE];
131} __attribute__((__packed__));
132struct btrfs_stripe {
133  __le64 devid;
134  __le64 offset;
135  __u8 dev_uuid[BTRFS_UUID_SIZE];
136} __attribute__((__packed__));
137struct btrfs_chunk {
138  __le64 length;
139  __le64 owner;
140  __le64 stripe_len;
141  __le64 type;
142  __le32 io_align;
143  __le32 io_width;
144  __le32 sector_size;
145  __le16 num_stripes;
146  __le16 sub_stripes;
147  struct btrfs_stripe stripe;
148} __attribute__((__packed__));
149#define BTRFS_FREE_SPACE_EXTENT 1
150#define BTRFS_FREE_SPACE_BITMAP 2
151struct btrfs_free_space_entry {
152  __le64 offset;
153  __le64 bytes;
154  __u8 type;
155} __attribute__((__packed__));
156struct btrfs_free_space_header {
157  struct btrfs_disk_key location;
158  __le64 generation;
159  __le64 num_entries;
160  __le64 num_bitmaps;
161} __attribute__((__packed__));
162#define BTRFS_HEADER_FLAG_WRITTEN (1ULL << 0)
163#define BTRFS_HEADER_FLAG_RELOC (1ULL << 1)
164#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
165#define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
166#define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
167struct btrfs_extent_item {
168  __le64 refs;
169  __le64 generation;
170  __le64 flags;
171} __attribute__((__packed__));
172struct btrfs_extent_item_v0 {
173  __le32 refs;
174} __attribute__((__packed__));
175#define BTRFS_EXTENT_FLAG_DATA (1ULL << 0)
176#define BTRFS_EXTENT_FLAG_TREE_BLOCK (1ULL << 1)
177#define BTRFS_BLOCK_FLAG_FULL_BACKREF (1ULL << 8)
178#define BTRFS_EXTENT_FLAG_SUPER (1ULL << 48)
179struct btrfs_tree_block_info {
180  struct btrfs_disk_key key;
181  __u8 level;
182} __attribute__((__packed__));
183struct btrfs_extent_data_ref {
184  __le64 root;
185  __le64 objectid;
186  __le64 offset;
187  __le32 count;
188} __attribute__((__packed__));
189struct btrfs_shared_data_ref {
190  __le32 count;
191} __attribute__((__packed__));
192struct btrfs_extent_inline_ref {
193  __u8 type;
194  __le64 offset;
195} __attribute__((__packed__));
196struct btrfs_extent_ref_v0 {
197  __le64 root;
198  __le64 generation;
199  __le64 objectid;
200  __le32 count;
201} __attribute__((__packed__));
202struct btrfs_dev_extent {
203  __le64 chunk_tree;
204  __le64 chunk_objectid;
205  __le64 chunk_offset;
206  __le64 length;
207  __u8 chunk_tree_uuid[BTRFS_UUID_SIZE];
208} __attribute__((__packed__));
209struct btrfs_inode_ref {
210  __le64 index;
211  __le16 name_len;
212} __attribute__((__packed__));
213struct btrfs_inode_extref {
214  __le64 parent_objectid;
215  __le64 index;
216  __le16 name_len;
217  __u8 name[0];
218} __attribute__((__packed__));
219struct btrfs_timespec {
220  __le64 sec;
221  __le32 nsec;
222} __attribute__((__packed__));
223struct btrfs_inode_item {
224  __le64 generation;
225  __le64 transid;
226  __le64 size;
227  __le64 nbytes;
228  __le64 block_group;
229  __le32 nlink;
230  __le32 uid;
231  __le32 gid;
232  __le32 mode;
233  __le64 rdev;
234  __le64 flags;
235  __le64 sequence;
236  __le64 reserved[4];
237  struct btrfs_timespec atime;
238  struct btrfs_timespec ctime;
239  struct btrfs_timespec mtime;
240  struct btrfs_timespec otime;
241} __attribute__((__packed__));
242struct btrfs_dir_log_item {
243  __le64 end;
244} __attribute__((__packed__));
245struct btrfs_dir_item {
246  struct btrfs_disk_key location;
247  __le64 transid;
248  __le16 data_len;
249  __le16 name_len;
250  __u8 type;
251} __attribute__((__packed__));
252#define BTRFS_ROOT_SUBVOL_RDONLY (1ULL << 0)
253#define BTRFS_ROOT_SUBVOL_DEAD (1ULL << 48)
254struct btrfs_root_item {
255  struct btrfs_inode_item inode;
256  __le64 generation;
257  __le64 root_dirid;
258  __le64 bytenr;
259  __le64 byte_limit;
260  __le64 bytes_used;
261  __le64 last_snapshot;
262  __le64 flags;
263  __le32 refs;
264  struct btrfs_disk_key drop_progress;
265  __u8 drop_level;
266  __u8 level;
267  __le64 generation_v2;
268  __u8 uuid[BTRFS_UUID_SIZE];
269  __u8 parent_uuid[BTRFS_UUID_SIZE];
270  __u8 received_uuid[BTRFS_UUID_SIZE];
271  __le64 ctransid;
272  __le64 otransid;
273  __le64 stransid;
274  __le64 rtransid;
275  struct btrfs_timespec ctime;
276  struct btrfs_timespec otime;
277  struct btrfs_timespec stime;
278  struct btrfs_timespec rtime;
279  __le64 reserved[8];
280} __attribute__((__packed__));
281struct btrfs_root_ref {
282  __le64 dirid;
283  __le64 sequence;
284  __le16 name_len;
285} __attribute__((__packed__));
286struct btrfs_disk_balance_args {
287  __le64 profiles;
288  union {
289    __le64 usage;
290    struct {
291      __le32 usage_min;
292      __le32 usage_max;
293    };
294  };
295  __le64 devid;
296  __le64 pstart;
297  __le64 pend;
298  __le64 vstart;
299  __le64 vend;
300  __le64 target;
301  __le64 flags;
302  union {
303    __le64 limit;
304    struct {
305      __le32 limit_min;
306      __le32 limit_max;
307    };
308  };
309  __le32 stripes_min;
310  __le32 stripes_max;
311  __le64 unused[6];
312} __attribute__((__packed__));
313struct btrfs_balance_item {
314  __le64 flags;
315  struct btrfs_disk_balance_args data;
316  struct btrfs_disk_balance_args meta;
317  struct btrfs_disk_balance_args sys;
318  __le64 unused[4];
319} __attribute__((__packed__));
320#define BTRFS_FILE_EXTENT_INLINE 0
321#define BTRFS_FILE_EXTENT_REG 1
322#define BTRFS_FILE_EXTENT_PREALLOC 2
323#define BTRFS_FILE_EXTENT_TYPES 2
324struct btrfs_file_extent_item {
325  __le64 generation;
326  __le64 ram_bytes;
327  __u8 compression;
328  __u8 encryption;
329  __le16 other_encoding;
330  __u8 type;
331  __le64 disk_bytenr;
332  __le64 disk_num_bytes;
333  __le64 offset;
334  __le64 num_bytes;
335} __attribute__((__packed__));
336struct btrfs_csum_item {
337  __u8 csum;
338} __attribute__((__packed__));
339struct btrfs_dev_stats_item {
340  __le64 values[BTRFS_DEV_STAT_VALUES_MAX];
341} __attribute__((__packed__));
342#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
343#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
344#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
345#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
346#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
347#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
348#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
349struct btrfs_dev_replace_item {
350  __le64 src_devid;
351  __le64 cursor_left;
352  __le64 cursor_right;
353  __le64 cont_reading_from_srcdev_mode;
354  __le64 replace_state;
355  __le64 time_started;
356  __le64 time_stopped;
357  __le64 num_write_errors;
358  __le64 num_uncorrectable_read_errors;
359} __attribute__((__packed__));
360#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
361#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
362#define BTRFS_BLOCK_GROUP_METADATA (1ULL << 2)
363#define BTRFS_BLOCK_GROUP_RAID0 (1ULL << 3)
364#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
365#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
366#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
367#define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7)
368#define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8)
369#define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | BTRFS_SPACE_INFO_GLOBAL_RSV)
370enum btrfs_raid_types {
371  BTRFS_RAID_RAID10,
372  BTRFS_RAID_RAID1,
373  BTRFS_RAID_DUP,
374  BTRFS_RAID_RAID0,
375  BTRFS_RAID_SINGLE,
376  BTRFS_RAID_RAID5,
377  BTRFS_RAID_RAID6,
378  BTRFS_NR_RAID_TYPES
379};
380#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | BTRFS_BLOCK_GROUP_SYSTEM | BTRFS_BLOCK_GROUP_METADATA)
381#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 | BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6 | BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID10)
382#define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | BTRFS_BLOCK_GROUP_RAID6)
383#define BTRFS_AVAIL_ALLOC_BIT_SINGLE (1ULL << 48)
384#define BTRFS_SPACE_INFO_GLOBAL_RSV (1ULL << 49)
385#define BTRFS_EXTENDED_PROFILE_MASK (BTRFS_BLOCK_GROUP_PROFILE_MASK | BTRFS_AVAIL_ALLOC_BIT_SINGLE)
386struct btrfs_block_group_item {
387  __le64 used;
388  __le64 chunk_objectid;
389  __le64 flags;
390} __attribute__((__packed__));
391struct btrfs_free_space_info {
392  __le32 extent_count;
393  __le32 flags;
394} __attribute__((__packed__));
395#define BTRFS_FREE_SPACE_USING_BITMAPS (1ULL << 0)
396#define BTRFS_QGROUP_LEVEL_SHIFT 48
397#define BTRFS_QGROUP_STATUS_FLAG_ON (1ULL << 0)
398#define BTRFS_QGROUP_STATUS_FLAG_RESCAN (1ULL << 1)
399#define BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT (1ULL << 2)
400#define BTRFS_QGROUP_STATUS_VERSION 1
401struct btrfs_qgroup_status_item {
402  __le64 version;
403  __le64 generation;
404  __le64 flags;
405  __le64 rescan;
406} __attribute__((__packed__));
407struct btrfs_qgroup_info_item {
408  __le64 generation;
409  __le64 rfer;
410  __le64 rfer_cmpr;
411  __le64 excl;
412  __le64 excl_cmpr;
413} __attribute__((__packed__));
414struct btrfs_qgroup_limit_item {
415  __le64 flags;
416  __le64 max_rfer;
417  __le64 max_excl;
418  __le64 rsv_rfer;
419  __le64 rsv_excl;
420} __attribute__((__packed__));
421#endif
422